Charging device for wirelessly charging an electrical energy store and method for controlling a charging device

Abstract

A charging device for wirelessly charging an electrical energy store of a mobile terminal has an air channel, a support that adjoins the air channel, a contact face, an energy transmission unit for wirelessly transmitting energy to the contacted mobile terminal, at least one temperature sensor designed to measure air temperature flowing in the air channel, and a charging controller connected to the energy transmission unit that controls at least one charging parameter. The charging device is designed to control the transmission of energy from the energy transmission unit to the contacted mobile terminal based on the temperature measured by the temperature sensor.

1 . A charging device for wirelessly charging an electrical energy store of a mobile terminal, comprising:
 an air channel;   a support that adjoins the air channel, wherein the support has a contact face for placing the mobile terminal on the contact face to create a contacted mobile terminal;   an energy transmission unit for wirelessly transmitting energy to the contacted mobile terminal;   at least one temperature sensor; and   a charging controller connected to the energy transmission unit, wherein the charging controller is designed to control the transmission of energy from the energy transmission unit to the contacted mobile terminal based at least in part on the temperature measured by the at least one temperature sensor;   wherein the at least one temperature sensor is designed to measure air temperature of air flowing in the air channel, wherein and the charging controller is designed to control at least one charging parameter for energy transmitted from the energy transmission unit and/or the airflow of the air flowing in the air channel.   
     
     
         2 . The charging device as claimed in  claim 1 , wherein the charging controller controls the at least one charging parameter for the energy transmitted from the energy transmission unit and/or controls the airflow of the air flowing in the air channel based at least in part on a temperature of the mobile terminal, wherein the temperature of the mobile terminal is determined as a measure of an increase in the air temperature of the air flowing in the air channel past the contact face with the mobile terminal placed thereon, which occurs from the entry of the air before the region of the contact face to the exit after the region of the contact face. 
     
     
         3 . The charging device as claimed in  claim 2 , wherein the at least one temperature sensor comprises a first temperature sensor is arranged in the air channel in a direction of airflow after the contact face, and wherein and the charging controller is designed to determine the increase in the air temperature from a difference between the temperature measured using the first temperature sensor and a measured ambient temperature adopted as an estimated variable or supplied by the charging device. 
     
     
         4 . The charging device as claimed in  claim 3 , wherein the at least one temperature sensor comprises a second temperature sensor is arranged in the air channel in the direction of airflow before the contact face, and wherein the charging controller is designed to determine the increase in the air temperature from the difference between the measured ambient temperature and the temperature measured using the first temperature sensor and a temperature measured using the second temperature sensor. 
     
     
         5 . The charging device as claimed in  claim 1 , further comprising a fan communicatively connected to the air channel. 
     
     
         6 . The charging device as claimed in  claim 5 , wherein the charging controller is designed to activate the fan to bring about a first airflow speed for of the airflow in the air channel and to measure a first air temperature at the first airflow speed, wherein the charging controller is designed to activate the fan to bring about a second airflow speed of the airflow in the air channel and to measure a second air temperature at the second airflow speed, and wherein the charging controller is designed to determine the temperature of the mobile terminal or the increase in the air temperature from the difference between the measured first air temperature and the measured second air temperature. 
     
     
         7 . The charging device as claimed in  claim 5 , wherein the charging controller is designed to cyclically activate the fan at measurement intervals to bring about a reduced airflow speed of the airflow in the air channel and to measure the air temperature at a selected measurement interval at the reduced airflow speed and to determine the temperature of the mobile terminal proportionally to the air temperature measured at the selected measurement interval. 
     
     
         8 . The charging device as claimed in  claim 1 , wherein the charging controller is designed to reduce or switch off a charging output and/or to increase an airflow speed by controlling at least one charging parameter for the energy transmitted from the energy transmission unit. 
     
     
         9 . A method for controlling a charging device as claimed in  claim 1 , comprising:
 measuring an air temperature of air that flows directly or indirectly past a mobile terminal in the air channel that adjoins a contacted mobile terminal, and   controlling at least one charging parameter for energy transmission using the energy transmission unit and/or controlling airflow of the air flowing in the air channel based at least in part on the measured air temperature.   
     
     
         10 . The method for controlling a charging device as claimed in  claim 9 , wherein controlling the at least one charging parameter for energy transmission using the energy transmission unit and/or the airflow of the air flowing in the air channel comprises measuring an increase in air temperature of the air flowing in the air channel past the contact face with the mobile terminal placed thereon, which occurs from an entry of the air before a region of the contact face to an exit after the region of the contact face. 
     
     
         11 . The method as claimed in  claim 10 , wherein measuring the increase in the air temperature of the air flowing in the air channel comprises measuring a first temperature in the air channel in a direction of airflow after the contact face, and determining the increase in the air temperature from a difference between a measured first temperature and a measured ambient temperature adopted as an estimated variable or supplied by the charging device. 
     
     
         12 . The method as claimed in  claim 10 , wherein the increase in the air temperature of the air flowing in the air channel comprises measuring a first temperature in the air channel in the direction of airflow before the contact face as a variable that is proportional to the ambient temperature and determining the increase in the air temperature from a difference between the first temperature and a second temperature which is the ambient temperature. 
     
     
         13 . The method as claimed in  claim 10 , further comprising
 activating a fan to bring about a first airflow speed of the airflow in the air channel and measuring a first air temperature at the first airflow speed,   activating the fan to bring about a second airflow speed of the airflow in the air channel and measuring a second air temperature at the second airflow speed, and   determining a temperature of the mobile terminal or an increase in the air temperature from the difference between the measured first air temperature and the measured second air temperature.   
     
     
         14 . The method as claimed in  claim 9 , further comprising cyclical activation of a fan at measurement intervals to bring about a reduced airflow speed of the airflow in the air channel, measuring an air temperature present at a selected measurement interval at the reduced airflow speed, and determining a of the temperature of the mobile terminal proportionally to the air temperature measured at the selected measurement interval. 
     
     
         15 . The method as claimed in  claim 9 , wherein control of the at least one charging parameter for the energy transmitted from the energy transmission unit is performed so as to reduce or switch off the charging output and/or control of the airflow of the air flowing in the air channel to cause an increase in the air temperature of the air flowing in the air channel past the contact face with the mobile terminal placed thereon, which occurs from the entry of the air before a region of the contact face to the exit after the region of the contact face.